Bigfoot Wood Knocking

Wood Knocking is the action of hitting two pieces of
wood together(usually a tree) to create a noise. The goal in this
technique is to get Bigfoot to answer by wood knocking back or by
making a sound.
This actually does occur with other known apes as a way to
communicate over long distances. No Bigfoot has ever actually been seen
beating a tree or creating such a sound, but there has been reports
of people hearing the sounds of distant wood knocking throughout
forests. Other theories suggest that Bigfoot isn't using wood at all,
but rather clapping, making noise with its mouth, or pounding on its
chest. Chest pounding is a way gorillas communicate, and the noise can
travel long distances.